The purpose of adding straw in the process of composting chicken manure into organic fertilizer

The main material of the bio-organic fertilizer production line is chicken manure, but in the process of chicken manure fermentation, about 30% of straw or straw should be added as auxiliary materials. Why do you need to add straw or straw as an auxiliary material?

1. Adjust the carbon-nitrogen ratio

The N content of chicken manure is too high, while the C element is low. A low ratio of carbon and nitrogen will inhibit the reproduction of microorganisms due to insufficient energy, resulting in slow and incomplete decomposition. The C element in crops such as straw is relatively high, and adding an appropriate amount of straw can adjust the carbon-nitrogen ratio of compost raw materials, which is conducive to decomposing.

2. Neutralize moisture

The water content of livestock and poultry manure is too high. It is difficult to evaporate the water in a short time without adding auxiliary materials. It is necessary to add dry matter to adjust the water content. Straw is relatively dry and has strong water absorption, which is very suitable as an auxiliary material to neutralize moisture. Then turn the fermentation pile through the compost turning machine, so that the fermentation time period will be greatly shortened and the working time efficiency will be improved.

3. Increase the stacking gap

In order to save space, the height of the compost is generally more than 1 meter, or even as high as 2 meters. The high proportion of poultry manure can easily form an ozone environment. The pulverized straw has a large porosity, which can increase the external air to enter the interior of the stockpile and reduce the anaerobic reaction to produce stench. In addition, it is also necessary to use a compost turning machine to turn and throw regularly to increase the oxygen content of the material pile, so that the beneficial microorganisms can speed up the reproduction speed and improve the fermentation efficiency. At the same time, the temperature of the material pile can be adjusted to avoid the ultra-high temperature generated by fermentation. Loss of nutrients in stockpile.